Page 20 of Flexible Microwave Cable - UTiFLEX by Micro-Coax, Inc.

h phase elpful formulas characteristic impedance z0 =138 log10 d e d ohms 30.5 xfxl inches vp capacitance c 7.38 e log10 d d delay t 1.016 e ns/ft l 0.984t e ft pf/ft ppm x 30.5 xfxl inches vp x 106 d d c 24.2 e log10 d d t 3.33 e l 0.300 t e pf/m ns/m m symbols e z0 ddtl vp fco r1 r2 pf f relative dielectric constant characteristic impedance dielectric diameter inches center conductor diameter inches time in nanoseconds length velocity of propagation cutoff frequency attenuation ratio of center cond conductivity to copper ratio of outer cond conductivity to copper dielectric power factor frequency in ghz velocity of propagation vp 1 x 100 e of free-space velocity cutoff frequency fco 7.5 e d +d ghz attenuation theoretical at 20º c 0.434 fr1 r2 2.78 f e pf z0 d d db/100 ft c able assembly care and handling equipment using the cable assemblies the assemblies are shipped in coils and must be carefully unrolled when ready for use failure to follow these guidelines can damage the cable assembly even the smallest dent in the cable or lightest scratch on the connector interface can adversely affect the cable s performance microwave cable assemblies are precision components that can be extremely fragile proper use routine inspection and cleaning of the connectors are required to maintain reliable performance observe the minimum bend radius specified for the cable avoid pinching crushing twisting or dropping the cable assemblies never pull micro-coax 206 jones boulevard pottstown pa 19464-3465 usa phone 610.495.0110 fax 610.495.6656 www.micro-coax.com 18

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